BAPI and backend Webdynpro model classes

Three basic questions:
1. Does it have to be a BAPI for backend connection or any remote RFC-enabled FM will do?
2. Do I have to map all the (BAPI's) FM's import and export parameters into the model relations and their cardinalities or can i pick and choose the ones that I'm after? If so, how do I know which are essential and which ones I can ignore?
3. Between the wizards and the plethora of objects that need to be created and linked what is the most consuming aspect of configuring (I don't think anyone would want to write code for all of them) a backend webdynpro?

Hi Greg,
1) If you are using WebDynpro remote RFC-enabled FM will do.
2) No need you need not Map all the input and output paramaters.
3)check these links related to configuration.
Please refer the following links.
1)For JCO configurations & Settings:-
http://help.sap.com/saphelp_erp2004/helpdata/en/3a/3b1b40fcdd8f5ce10000000a155106/frameset.htm
2)Tutorial on how to call a BAPI :-
http://help.sap.com/saphelp_erp2004/helpdata/en/66/6f040c5ce8214eaf48c92e691639ed/frameset.htm
Hope it helps.
Regards,
RK

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Hi,
I have a BAPI ZBAPI that has a tables parameter ZPernr of type ZTable with two elements pernr and name.
I used adaptive RFC model and created model classes for the BAPI.
My question how do i set list of pernr and name to the tables parameter in the webdynpro for java.
I have the following methods available
ZBAPI input = new ZBAPI();
1.ZTable table = new ZTable();
table.setPernr(pernr);
table.setname(name);
input.addZPernr(table);
how do i set the table parameter for multiple pernr and name
2.
add all the pernr and name to list and set that list to input in the following way
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out of two methods mentioned which one is correct.
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Thanks
Bala Duvvuri

Hi Bala,
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List pernrList = new ArrayList();
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Try this:
HROBJECT pernrList = new HROBJECT();
pernrList.setPernr(pernr);
input.setPernr_List(pernrList);
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If you want to pass list of pernrs, you can pass in alternate way
IPrivate<viewname>.I<nodeame>Node prNode = wdContext.node<node>();
IPrivate<viewname>.I<nodeame>Element prEle;
for (int i = 0; i < table.size(); i++) {
HROBJECT pernrList = new HROBJECT();
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prEle = prNode.create<nodeame>Element(pernrList);
prNode.addElement(prEle);
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Once I execute the BAPI how do i iterate thru second table parameter PERNR_PERFRAT to get pernr and performance rating text
Say your node name is PERNR_PERFRAT
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Regards,
Siva

Com.sap.tc.webdynpro.model.webservice.exception.WSModelRuntimeException

Hello Team,
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Dear Shailesh,
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Hi,
i want to know difference between BAPI and RFC in SAP,
can we call SAP GUI screen from NON SAP System Using BAPI.
Reg,
Hariharan

Hi Ravishankar,
The difference is not importat while you understand the concept.
I think, RFC is the protocol for calling functions from external systems in R/3.
I understand like BAPI a series of complet functions that SAP offers you for use and model a business use.
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BAPIs provide stable and standardized methods to achieve seamless integration between the R/3 System and external applications, legacy systems and add-ons.
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Reading instances of SAP business objects
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Create( ) and CreateFromData! ( )
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Change( )
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Delete( ) and Undelete( ) The BAPI Delete() deletes an instance of an SAP business object type from the database or sets a deletion flag.
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Cancel ( ) Unlike the BAPI Delete(), the BAPI Cancel() cancels an instance of a business object type. The instance to be cancelled remains in the database and an additional instance is created and this is the one that is actually canceled. The Cancel() BAPI is an instance method.
Add<subobject> ( ) and Remove<subobject> ( ) The BAPI Add<subobject> adds a subobject to an existing object inst! ance and the BAPI and Remove<subobject> removes a subobject from an object instance. These BAPIs are instance methods.
Check these Links out
http://searchsap.techtarget.com/ateQuestionNResponse/0,289625,sid21_cid558752_tax293481,00.html
http://www.sap-img.com/abap/interview-question-on-bapi-rfc-abap-objects-tables.htm
http://www.sap-img.com/fu033.htm
http://www.sap-img.com/abap/ale-bapi.htm
Refer following SDN threads:
Diff. Between BAPI and RFC
Re: BAPI and RFC
Hope this resolves your query.
Reward all the helpful answers.
Regards

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After importing the Model and creating a context node i have the following structure:
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item is of Type byte
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wdContext.currentRequest_X_putFileDataSimpleElement().setPassword("xxx");
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int i = 1;
int j = 0;
while (i!=-1)
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Model-Object is not a complex type for every byte added this way.
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The second way i tried is:
public boolean putKMDataSimple( com.sap.tc.webdynpro.services.sal.datatransport.api.IWDResource fin ) {
try
wdContext.currentRequest_X_putFileDataSimpleElement().setFullFileName("abc");
wdContext.currentRequest_X_putFileDataSimpleElement().setUsername("def");
wdContext.currentRequest_X_putFileDataSimpleElement().setPassword("xxx");
byte[] buffer = new byte[1];
ArrayList<Byte> btlist = new ArrayList<Byte>();
InputStream in = fin.read(false);
int i = 1;
int j = 0;
while (i!=-1)
     i = in.read(buffer);
     if (i!=-1)
          btList.add(buffer[0]);
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Edited by: Matthias Hayk on Dec 1, 2008 5:51 PM
Edited by: Matthias Hayk on Dec 2, 2008 10:56 AM

Ok Vesselin and thanx for your idea,
so i adapted the source in the way you told like the following:
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                 byte[] buffer = new byte[1];
                 InputStream in = fin.read(false);
                 int i = 1;
                 int j = 0;
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                      i = in.read(buffer);
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                           // Byte gelesen
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                           j++;
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execute
[EXCEPTION]
java.lang.IllegalArgumentException
at java.lang.reflect.Array.set(Native Method)
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BAPI Name in RFC model

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Hi,
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Class methodology is the future.
In this case, i would build an instantiated class where you would select all the details for 1 employee. Store those in attributes.
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that way anyone who wants to know anything about an EE can just instantiate your class and retrieve the appropriate attribute or use a method to determine what they need.
Edited by: Robert Phelan on Aug 4, 2011 8:04 PM

BAPI and backend Webdynpro model classes

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